RC3225J393CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225J393CS is a 39 kOhm ±5% 1/3W chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package. This thick film, moisture-resistant component operates across -55°C to 155°C and is ROHS3 compliant with MSL 1 rating. The part is currently active in production with 936 pieces available in inventory. Substitute parts are identified when equivalent resistance values, package dimensions, and operating specifications align with application requirements while offering improved performance characteristics or enhanced availability.

Substiute Parts

RC3225J393CS

Samsung Electro-MechanicsIn Stock: 968RC3225J393CS Datasheet

Current PartRFQ

RC1210FR-0739KL

YAGEOIn Stock: 10927RC1210FR-0739KL Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225J393CS is determined by the following criteria:

Mandatory Matching Parameters:

• Resistance value: 39 kOhms (exact match required)
• Package / Case: 1210 (3225 Metric) (physical compatibility)
• Composition: Thick Film (material consistency)
• Temperature Coefficient: ±100ppm/°C (stability requirement)
• Operating Temperature Range: -55°C ~ 155°C (environmental compatibility)
• Moisture Resistance: Yes (feature requirement)
• RoHS Status: ROHS3 Compliant (regulatory requirement)
• Moisture Sensitivity Level: MSL 1 (handling compatibility)

Allowable Parameter Variations:

• Tolerance: May improve from ±5% to ±1% (tighter tolerance acceptable)
• Power Rating: May increase from 0.333W to 0.5W (higher power rating acceptable)
• Packaging Format: May differ (Tape & Reel acceptable as alternative to standard packaging)

The substitute part RC1210FR-0739KL meets all mandatory criteria while offering improved tolerance and power rating specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (RC3225J393CS): Select the RC3225J393CS when the original Samsung Electro-Mechanics specification is required for design continuity, existing inventory management, or when the ±5% tolerance and 0.333W power rating are sufficient for the application. This part maintains active production status and carries ROHS3 compliance with MSL 1 rating.

Substitute Part Selection (RC1210FR-0739KL): Select the RC1210FR-0739KL when improved tolerance accuracy (±1% versus ±5%) or increased power dissipation capability (0.5W versus 0.333W) is required. This YAGEO component is ROHS3 compliant with identical MSL 1 rating and maintains full compatibility across all mandatory electrical and mechanical parameters. Higher inventory availability (10,850 pieces) supports supply chain continuity.

Both parts satisfy REACH unaffected status and EAR99 export classification. Selection between these components should be based on tolerance requirements, thermal design margins, and supply chain considerations rather than functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can RC1210FR-0739KL directly replace RC3225J393CS in existing designs?

A: Yes. Both components share identical 39 kOhm resistance, 1210 package, thick film composition, temperature coefficient, operating range, and compliance certifications. Physical dimensions are within tolerance for PCB footprint compatibility. The substitute offers improved tolerance (±1% vs ±5%) and higher power rating (0.5W vs 0.333W).

Q: What are the dimensional differences between these parts?

A: RC3225J393CS measures 0.126" L x 0.100" W (3.20mm x 2.55mm) with 0.026" max height. RC1210FR-0739KL measures 0.122" L x 0.102" W (3.10mm x 2.60mm) with 0.024" max height. Both fit the standard 1210 (3225 Metric) footprint with negligible variation acceptable for automated assembly.

Q: Are there tolerance implications when substituting?

A: The substitute part offers tighter tolerance (±1% vs ±5%), which improves circuit accuracy. This is a performance enhancement with no negative impact. Applications requiring the original ±5% tolerance will function identically with the ±1% substitute.

Q: Does packaging format affect substitution eligibility?

A: RC1210FR-0739KL is supplied in Tape & Reel format while RC3225J393CS uses standard packaging. Both formats contain identical components. Format selection depends on assembly process requirements (automated vs manual) rather than electrical compatibility.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both components operate across -55°C to 155°C with ±100ppm/°C temperature coefficient. Thermal performance is equivalent. The substitute's higher power rating (0.5W) provides additional thermal margin in power-dissipation-limited designs.

Q: What is the significance of MSL 1 rating for both parts?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture bake requirements. Both components can be stored indefinitely without special humidity controls, simplifying inventory management and reducing handling costs.